배양 신경세포의 분화에 따른 Transferrin 흡수와 그 수용체 발현에 대한 자기방사기록 및 면역세포화학적 연구

조사선,박광태,유영복,이경훈,박경한,황덕호,백상호 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.3

중앙아시아 벽화 보존처리(1) : 벽화(본4074, 본4096)의 상태조사

강형태,이용희,유혜선,김연미,조연태,시고 아오키,노리코 야마모토,켄타로 오바야시 국립중앙박물관 2001 박물관보존과학 Vol.3 No.-

국립중앙박물관은 용산 새 박물관의 전시 유물로 선정된 중앙아시아 벽화의 연차적인 보존처리를 위해 “독립행정법인 일본 도쿄문화재연구소’’와 공동연구를 모색하게 되었다. 2001년에 본4074, 본4096 작은 벽화편 2점의 보존처리를 시작하면서 벽화의 균열 박락 등 손상상태, 구조와 구성재료, 이전 보존처리에서 적용된 재료와 방법에 대한 기초조사를 실시하였다. 조사결과 본4074, 본4096 2점의 벽화는 흙과 지푸라기를 반죽하여 만든 벽체에 석고를 발라 바탕으로 하고 그 위에 채색을 한 것으로 나타났으며 벽체 속에 포함된 지푸라기의 방사선 탄소연대측정 결과 본 벽화는 10세기 말에서 13세기 초에 만들어진 것으로 나타났다. 또한 X-선회절 분석 결과 화면의 흰색 바탕은 gypsum[Ca(SO₄)·2H₂O]과 CaSO₄, Calcite(CaCO₃)가 적색계통은 연단(鉛丹:Pb₃O₄)과 led arsenate[Pb(As₂O₆)], 녹색계통은 Cuprite(Cu₂O)와 arsenolite(As₂O₃), arsenic oxide(As₂O₄) 등이 사용된 것으로 조사되었다. This article is about a joint project carried out by the National Museum of Korea and the Tokyo Cultural Properties Research Institute for the conservation of central Asia Wall painting that has been selected for the exhibition at the new Seoul National Museum of Korea at Yongsan. The investigation of the wall painting revealed very useful information. This includes the condition of the object, and the identification of evident damage, such as cracks, loss of pigment, plus materials and methods employed during the object's creation, as well as previous conservation treatment. The object was mainly made by applying plaster to the body (wall) that consisted of a mixture of soils and rice straws. Then, on the surface of the wall-painting, pigments were used to draw and to colour it. As a part of the investigation, radiocarbon dating was conducted using straw samples taken from the object. The result indicates that the object is probably dated form between the end of the 10th Century and the beginning of the 13th Century. The result of X-ray diffraction also revealed the composition of the pigments used on the surface. These are 1. gypsom[Ca(SO₄)·2H₂O], CaSO₄ and Calcite(CaCO₃) and Calcite(CaCO₃) that were used for the white background. 2. Pb₃O₄ and led Arsenate [Pb(As₂O₆) that were used for the red colouring. 3. Cuprite(Cu₂O), Arsenolite(As₂O₃) and Arsenic Oxide(As₂O₄) that were used for the green colouring.

연령에 따른 한국인의 음향지표 변화와 특성

김형태,조승호,윤성문,선동일,김민식 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.1

쇼트피닝가공한 평기어의 최적 피닝강도 탐색에 관한 연구

이동선,이국진,김태형,정성균 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

The shot peening process is often used to improve fatigue properties of metal parts. Among them, It is the most use in an auto-component. In order to achieve optimum, repeatable and reliable fatigue enhancement from the shot peening process, the important shot peening parameters must be controlled. In this paper, the optimum peening intensity (Almen intensity) condition is investigated by experiment..The Spur Gear steel was used to investigate shot peening effects. The fatigue life at σ_(a)=1,050 and σ_(a)=1,250MPa first gently increases, then drops gently as peening intensity increases compared with unpeened specimen. Experimental results show that the optimum peening intensity range is 0.391~0.434mmA..So the fatigue strength and fatigue life have been tremendously increased by optimum-peening treatment. However, the fatigue strength and fatigue life have been decreased by over peeing.

한의진단명과 진단요건의 표준화 연구 III : 3차년도 연구결과 보고

최선미,양기상,최승훈,박경모,박종현,심범상,김성우,노석선,이인선,정진홍,이진용,김달래,임형호,김윤범,박성식,송태원,김종우,이승기,최윤정,신순식 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1

The diagnostic requirements were suggested and explained regarding the systems of differentiation of symptoms and signs in the third year study of standardization and unification of the terms and conditions used for diagnosis in oriental medicine. The systems were as follows : - analyzing and differentiating of epidemic febrile disease - analyzing and differentiating in accordance with the Sasang constitution medicine based on four-type recognition - differentiation of disease according to pathological changes of Chong and Ren channels - standards for diagnosis of women's disease - standards for diagnosis of children's disease - standards for diagnosis of motor and sensor disturbance (-muscle. born, joint, etc.) - standards for diagnosis of neuropsychiatric disease - standards for diagnosis of five sense organ disease - standards for diagnosis of external disease The indivisual diagnosis pattern was arranged by the diagnostic requirements in the following order : another name, notion of diagnosis pattern, index of differentiation of symptoms and signs, the main point of diagnosis, analysis of diagnosis pattern, discrimination of diagnosis pattern, prognosis, a way of curing a disease, prescription, herbs in common use, disease appearing the diagnosis pattern, documents. The standards for diagnosis of each disease was arranged by the diagnostic requirements in the following order : another name, notion of disease, the main point of diagnosis, analyzing and differentiating of disease, analysis of disease, discrimination of disease, prognosis, a way of curing and prescription of disease, disease in western medicine appearing the disease in oriental medicine, documents.

금속 촉매를 이용한 poly-Si의 결정화에 관한 연구

金善浩,李秀京,金泰延,康娜榮,金亨駿 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

Nickel induced crystallization of amorphous silicon (a-Si) has been studied by selective deposition of Ni on a-Si thin films. The kinetics of crystallization for MIC was found to be greatly enhanced than that of SPC. Ni-induced crystallization is a promising technique for low-temperature fabrication of poly-Si thin-film transistors needed for large area applications. Lateral growth of polycrystalline silicon mediated by the formation of nickel silicide, has been successfully employed for the fabrication of high-performance TFTs. A-Si thin films on which Ni films were deposited with various thickness were crystallized as a function of annealing temperatures. Throughout the thesis work, wise choice of both the thickness of Ni and the annealing temperature was found to produce poly-Si films with high quality, thus potentially resulting in the production of TFTs with high performance.

TiAIN을 코팅한 WC공구의 절삭성능에 관한 연구

김현자,최현철,김영대,김일선,노태영,이규용 釜慶大學校 2001 釜慶大學校 論文集 Vol.6 No.-

Thin film of TiAlN was deposited onto ISO P20 tungsten carbide cutting insert tip substrate specimen using the FVAS (filtered vacuum arc system) at the substrate temperature of 80℃. Cutting and wear tests have been performed to the TiAlN coated and uncoated WC specimen, respectively under the same cutting conditions for the comparison. Cutting forces and tool wear of coated and uncoated carbide cutting tools were investigated by means of cutting length and cutting forces. Also tool wear and tool life were analyzed using the 3ch tool dynamometer amp lifier and oscilloscope. In this study cutting tests for the cutting performance of TiAlN coated WC-Co P20 to the steel alloy of SNCN420 have been curried out. Through the comparisons of cutting forces during the cutting tests and tool wear, we got the conclusions as follows.; ① In usual cutting conditions, main cutting force component showed higher value than the thrust force normal to the cutting direction especially cutting forces in the of early stage on cutting tests. But, after loosing the protective hard thin film on substrate or insert tip, the thrust force normal to the cutting direction showed much higher than main cutting force component. ② Within the range of 0.3㎜ build up edge in P20 insert tip, TiAlN coated tip was evaluated more stable in flank wear and less in crater wear than the uncoated specimen. ③ Through the wear growth curve of the specimen, tool life differences of uncoated and TiAlN coated tip at high speed (V=250[m/min]) was higher than the low speed(V=200[m/min]) case, compared to the average but the tool wear was almost same in both specimen for the case of normal wear occurred.

하악골에 발생한 골막 골육종

김태우,김승범,권혁찬,문선재,윤정훈,김형준,차인호,육종인,김진 대한악안면성형재건외과학회 2002 Maxillofacial Plastic Reconstructive Surgery Vol.24 No.1

Periosteal osteosarcoma is a distinct entity of malignant bone tumor with characteristic clinical, morphological, and histological features within the group of juxtacortical osteosarcoma. Periosteal osteosarcoma is predominantly located in the tubular long bones, and extremely rarely involving the jaws. A case of periosteal osteosarcoma of the right mandible is presented. A 27-year-old woman complained of the gingival swelling and bleeding tendency of the right posterior mandible. Clinical examination revealed a reddish brown strawberry-like swelling on the affected mucosa, which measured 1.5㎝×1.5㎝. The tumor was located on the lingual cortex of the mandible and extended into the surrounding soft tissues. Microscopically, the tumor consisted exclusively of atypical chondroblastic cells with a small osteoblastic area. A minimal bone marrow involvement was noted and the adjacent cortex was free of tumor. These findings suggested that the tumor originated from the periosteal cambium layer, which lies between the periosteal fibrous layer and the cortex of mandible.

시멘트 콘크리트의 건조수축균열 특성

박제선,윤경구,이주형,김태환,정원경 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

콘크리트는 본질적으로 인장강고와 휨강도가 약하며 취성적 성질을 나타내는 결점을 가지고 있으므로 이를 보강할 목적으로 콘크리트에 섬유를 혼입한 섬유보강 콘크리트가 크게 각광받고 있다. 특히 폴리프로필렌 섬유보강은 모르타르 및 콘크리트가 건조나 동해에 의해 수축될 때 구속에 의해 발생되는 인장응력 및 균열을 제어하고 인성의 증가와 충격, 마모, 피로에 대한 저항성, 내구성을 증대시키는 장점을 가지는 것으로 보고 되고 있다. 1축으로 구속된 건조수축의 구속으로 인한 조강형 콘크리트의 잔류응력을 선형모델을 이용하여 예측할 수 있었고 조강형 콘크리트에 섬유보강으로 인한 건조수축 제어효과는 일반큰코리트에 비해 효과가 매우 큰 것으로 나타났다. 따라서 폴리크로필렌 섬유의 혼입으로 인해 콘크리트의 균열제어가 가능하며, 균열 폭이 큰 균열보다는 많은 미세 균열을 유도하는 것을 알 수 있었다. 섬유보강 조강형 큰크리트의 동결융해저항특성은 거의 동해의 손상을 받지 않으며 좋은 내구성을 유지하고 있는 것으로 나타났다. 이는 불규칙하게 배향된 섬유가 공극수의 이동을 효과적으로 제어함으로써 메트릭스 내의 팽창압으로 인한 파괴를 최대한 줄였기 때문이라고 보여진다. 표면손상과 박리저항에 매우 우수하며 저항성을 증진시키는 효과가 뛰어남을 확인할 수 있었다. 따라서, 내구적 측면의 유지, 보수에 있어서도 섬유보강은 그 효과가 큰 것으로 나타났다. To improve the brittle nature of concrete, discrete fibers can be adapted in concrete. Since polypropylene fiber has many advantages in many points on its chemical stability and good durability, its usages have been increased gradually. It has been reported than polypropylene fibers can not only control restrained tensional stresses and cracks, but also increase toughness, resistance to impact, corrosion, fatigue, and durability. Although the polypropylene fiber reinforced concretes with ordinary cement have been studied so much, those with very early strength concretes have not studied at all. Therefore, it is necessary to initiate and conduct the researches for the polypropylene fiber reinforced very early strength concretes which has enough workability and durability. This study of polypropylene fiber reinforced very early strength concrete focused on the investigation each material's effect into strength development with analysis of restrained shrinkage properties with one-dimensional concrete members. The results showed that more optimized mixture combinations could be selected in very early strength concrete by incorporating polypropylene fibers, keeping in same strength levels at urgent repair works. The formation of needle-shape ettringite helps the early strength development, specially at flexural and this enables the repaired concrete structures or pavements to be opened to traffic after 3 hours of concrete placement. A residual stress of early strength concrete caused by one-dimensional restrained drying shrinkage was predicted from linear model. the control of shrinkage crack by fiber reinforcement at early strength concrete was better than that of ordinary portland cement concrete because of bridging effect of fiber at early age and resulting of more hair cracks rather than fewer wider cracks. As a results, this dissertation clearly validated the fiber reinforcement on the strength development and durability of polypropylene fiber reinforced very early strength concrete, and characteristic of restrained shrinkage. The proposed optimized concrete mixtures might be satisfactory applied at the repair works in fields, because of its durability and crack control capacity against freeze-thaw and contraction at early age, respectively.

重化學工業機械의 國産化方案에 關한 硏究 : 特히 窯業에 있어서의 燒成爐, 粉碎機, 排風機, 冷却機, 電氣集마器 自動枰量供給器 等의 製作을 目的으로

趙哲衡,朴碩喆,丁太權,宋鐵,桭達福,金基玉,朴煥奎,趙煥從,朴善鐘,金種一,李茂錫 朝鮮大學校 1977 綜合論文集 Vol.1977 No.-

This is to investigate the posibility of home manufacturing of heavy chemical industry machines, such as rotary kiln, crusher, blower, cooler, electrostatic precipitator and weighing feeder of cement plant. It is concluded that even though we can not make all of them (some of them are made now and some others are going to be made in the near future, some of them are made whole and some others are made partially), we can build or export the cement plant by importing the important machines which we can not make now and by substituting them with ours gradually.